Illustrated Glossary of Organic Chemistry

Isotope: One of a group of atoms that have the same number of protons (i.e., the have the same atomic number and are the same element) but differ in the number of neutrons (i.e., they have different mass).

Isotopes of Hydrogen
P = proton, N = neutron, E = electron


¹H One proton No neutrons		²H (deuterium) One proton One neutron		³H (tritium) One proton Two neutrons

Related terms: ¹H-NMR, H-NMR, proton NMR, ¹²C, carbon-12, ¹³C, carbon-13, ¹³C-NMR, C-NMR, carbon NMR, ¹⁴C, carbon-14, I, spin quantum number, kinetic isotope effect, mass spectrometry, molecular ion, M, M+1, M+2, m/z, nominal mass, exact mass
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